# chunkx vs Viana 2

The clearest difference is device support: chunkx at 3 against Viana 2's 1. chunkx also leads on iOS requirement (15.6 vs 17.4). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

chunkx ships an update every 6 weeks, Viana 2 every 2 months. The most recent releases landed on September 8, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | chunkx | Viana 2 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 42.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | — | Paid |
| Size | 99 MB | 19 MB |
| Requires iOS | **15.6** | 17.4 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Chunkx GmbH](https://appshunter.io/developer/1456465852) | [Freie Universitaet Berlin](https://appshunter.io/developer/1031084427) |

## What reviewers say

### chunkx

[App page](https://appshunter.io/ios/app/chunkx/id1456465853)

**In-app purchases:** none


### Viana 2

[App page](https://appshunter.io/ios/app/viana-2/id1554845327)

This app allows users to record and analyze motion from videos. It automatically determines the trajectory, position, and velocity of objects, offering advanced graphing and coordinate system tools for physics education.

**Highlights:** Record and analyze motion from videos, Automatic trajectory, position, and velocity determination, Adjustable video frame rates, Object tracking with marker adjustment, Display up to three graph types simultaneously, New phase diagram types, Real-time coordinate system and graph comparison, Export and import projects

**In-app purchases:** none


## Frequently asked questions

### Is chunkx free?

chunkx is free to download, with no in-app purchases.

### Is Viana 2 free?

Viana 2 is free to download, with no in-app purchases.

### Do chunkx or Viana 2 have ads?

Neither chunkx nor Viana 2 shows ads.

### Which is updated more often, chunkx or Viana 2?

chunkx ships an update every 6 weeks, and Viana 2 every 2 months. Most recently, chunkx was updated on September 8, 2026 and Viana 2 on June 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*